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Um, putting things into one note looks like a nice alternative to using outlook to file things but the way to do it seems complex from your description. You create the page in one note then go to outlook to send it to the new page then go back to the page and name it?
I don't see the average office worker thinking this is at all the solution to just dropping the email into a folder in outlook. (drag, drop, one action no going back and forth to another application.)
While one note seems like it works for you and you seem very detail oriented, most people will just be too lazy and leave it in outlook.